Sierra 18-3147 MerCruiser Alpha Gen II Water Pump KitSierra high-quality engine parts are designed to meet OEM specifications. For use with Gen II Lower S/N D469859 and Up.; Kit Includes: Carrier Seal 18-2354; Impeller 18-3056; Impeller Plate 18-3122; Impeller Key 18-3293; O-Ring 18-7420 ; Seal Ring Gasket 18-2944; Face Seal and Tool 18-2599; Water Pump Base to Face Plate Gasket 18-2564; Face Plate to Water Pump Cover Gasket 18-2566; Interchangeable With: Mercury; 817275T4; 817275Q05; 817275K05; 817275Q4; Mallory; 9-48315; GLM; 12414; Mercury Marine; 817275A5; Redline; RL3147;